A low-profile, even meager lifestyle allowed 19 hijackers to blend into the American tapestry. Does this mean others are still out there?

If the military campaign doesn't want the name "Operation Infinite Justice" because of its religious allusion, perhaps the mammoth investigation into the Sept. 11 terror attacks should adopt it, simply for accuracy. The name certainly fits, what with 7,000 FBI employees and countless state and local police officers following some 63,232 leads in the case. FBI Deputy Director Tom Pickard, a key figure in the case against the 1993 World Trade Center bombers, and the bureau's top man in New York, Barry Mawn, are running the investigation from Washington and two secret locations in Manhattan. Detectives and intelligence agents around the...